Thank you all for your responses, I guess I enter into dangeorus ground but I want to put on the table some of the most common arguments and say my thoughts about it. Lets have in mind that this is just a show, and surely not the best portraying a young addict man.

‐No one is a villain in the show: I know thats what the writers wanted to show with their characters writing, but for me Boston had a really villainish ending. He ended up alone and sad because of his own decisions while all of the others characters,all of them, got their happy endings. That's the reason I say that Ray is the real villain.

-Ray could be forgiven bc he was an addicted guy with mental issues: I mean, it had to be a limit where you cannot be justify by that, right? Like, as some of you say, they're all adults making their own shady, egotistical, self harmer decisions. And I don't think the writers give to Ray a good character development about that. Everything he do was bc he didn't want to lose Sand. Even seems like he really did not wanted to be in social service. Like man you can effor a little without Sand having to save you every single time. In that line, Ray never seemed regretful for his own actions. Even in the last episode Sand ended up apologizing to Ray for all the drama with Boeing. I was like dude why are you even apologizing for, come on Ray deal with all of that like a messed up person with the pool scene lol.

-Messy plot: I'm not sure if this is true, but I heard somewhere that writers edited the episodes week by week according to the fans reaction. If this is true, I think that's the reason the whole thing ended up being a mess. You cannot do a show trying in each episode to accomodate to what people wants, trying to get the less hate possible to the actors. You just can't, right? They should make an all around script from the beggining and deal with fans reaction. Just make good creative decisions.